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Concurrent Culture of Shrimp and Tilapia in the Coastal Pond

S. B. Saha
Bangladesh Fisheries Research Institute, Brackish water Station, Paikgacha, Khulna-9280, Bangladesh

M. Moniruzzaman
Bangladesh Fisheries Research Institute, Brackish water Station, Paikgacha, Khulna-9280, Bangladesh

M. J. Alam
Bangladesh Fisheries Research Institute, Brackish water Station, Paikgacha, Khulna-9280, Bangladesh

Abstract/ Executive Summary:

An on-farm study with the active participation of farmer was conducted in and around Paikgacha, Khulna to validate the technique of production of shrimp (Penaeus monodon) and genetically improved farmed tilapia (GIFT) in concurrent culture system in the brackish water ponds. The grow-out ponds were stocked with shrimp @ 2/m² and GIFT @1/m² standardized for concurrent culture in the on-station study. After 65 ~ 76 days of culture, shrimps of two ponds were attacked with white spot viral disease. In the other pond, production of shrimp was 339.29 kg/ha and that of GIFT was 1777. 02 kg/ha after 120 days of rearing. Cost of production in this pond was Tk. 1,35,346.00/ha with the cost benefit ratio of 1.00:2.34. Production of shrimp and GIFT in ponds with viral attack was 92.47~135.70 kg/ha and 1726/48~1782.00 kg/ha, respectively. Gross return from GIFT was higher than total cost of production in all ponds indicating that farmers will not loose investment for production in case of mass mortality of shrimp due to outbreak of viral disease. Extension of this production process with wider-scale would increase production of both shrimp and fish.

Keywords: Concurrent Culture, Shrimp, Tilapia, Coastal pond

Location: Khulna districts.

Start Date: 00-00-2009

End Date:

Program Area: Knowledge Management

Non-commodity: Validation

Objectives:

To validate the culture technique at the farmers' level of Shrimp and Tilapia fishes.

Methodology:

The study was conducted in three ponds of two shrimp farms in and around Paikgacha, Khulna in 2009. The grow-out ponds were stocked with shrimp @ 2/m² and GIFT, @1/m² after nursing as recommended for concurrent culture in the on-station studies. For nursing of post larvae (PL) of shrimp and fry of GEFT, two separate in-pond nurseries, each covering an area of 4~5% of the pond, were prepared by encircling with nylon net fastened in bamboo frame in every pond. After drying, soil of the ponds were treated with lime (CaO) @ 250 kg/ha. Then the ponds of both farms were fed with the tidal water of a tributary of Shibsa river up to a depth of 83~100cm. Animalcule of water was killed by applying rotenone and then dipterex @ 1.50 ppm each. Water of the ponds was then treated with dolomite @ 20 ppm and after three days, fertilized with urea @ 2.5 ppm and TSP @ 3.0 ppm. After production of sufficient plankton, required quantity of PL of shrimp (PL20) and fry of GIFT (2.65±0.15g) were stocked in the in-pond nurseries of pond # 1 oN 18^th March’ 2009 ad pond # 2 & 3 on 11^th March’ 2009. The area of ponds were 2000, 1308 and 1180 m² of ponds 1, 2 and 3, respectively. After two weeks, juveniles of shrimp and GIFT were allowed to spread throughout the culture pond by opening the nursery enclosure. Shrimps were fed with commercial pellet feed (Saudi-Bangla shrimp feed) and fishes with locally formulated feed (aprox. 35% protein content, consisting of a mixture of fishmeal -29%, sesame oil cake-15%, rice bran 35% and soybean meal-21%) twice daily following the technique as mentioned. After stocking, water of the ponds was treated monthly with dolomite @ 15.0 ppm and fertilized with urea @ 1.2 ppm and TSP @ 1.5ppm. To maintain undisturbed ecology of the ponds, no water was exchanged. Only the evaporated water was replenished by tidal water after screening. Water quality parameters viz., depth, temperature, salinity pH, transparency and alkalinity were monitored at fortnightly interval. But dissolved oxygen was monitored frequently. The water quality variables were determined following standard methods as mentioned. Growth of shrimp and GIFT was monitored fortnightly. Shrimps in pond # 2 and 3 were attacked with viral disease after 76 and 65 days of culture and a few dead shrimp was observed at the periphery of the ponds. At this situation, shrimp from these ponds were harvested by netting. Shrimp from pond # 1 and GIFT from all ponds were harvested after 120 days of rearing by netting followed by dewatering ponds. Growth and production were then estimated.

Source of Information: Bangladesh Journal of Agriculture, Vol: 37(1), pp: 11-16, 2012, ISSN: 0253-5408

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the result it can be concluded than total cost of production in all ponds indicating that farmers will not loose investment for production in case of mass mortality of shrimp due to outbreak of viral disease. Extension of this production process with wider-scale would increase production of both shrimp and fish.

Knowledge Management: Journal